The feeling of testostrone mixing with sadism and a mental orgasm, generally does not leave lovestains in your jeans.
This can happen when holding a wicked sword built for actual use, caressing a bitchin' gun, or any weapon for that matter.
It can happen after oblitorating a target/enemy with a vicious attack that completely rocks the room.
You may have a wargasm after witnessing sheer badass combat, such as watching 300, the best of UFC, ect.
On another note, a wargasm also occurs during these things if said thing lasts long enough for the body to fully process and fully grip HOW MUCH FUCKING DAMAGE THAT SORRY BASTARD JUST TOOK!!! (Veins popping out of temples with relish and emphasis)

-I think I just had a Wargasm and it was beautiful.

-"I think im about to have a Wargasm, someone get a mop and bucket!" (WHOOOSH!!!) "HAAaaaa...." *twitch, twitch*

-This sword just gave me a woody, and then I had a Wargasm, its as Wargasmic as that paintball gun I saw last night...

-DUUUDE!!! THAT POINT BLANK SHOTGUN TO THE MOUTH OUT OF NOWHERE JUST GAVE ME A WARGASM!!! FUCK THAT WAS NICE!

-300 gives me multiple Wargasms, that guy is a fuckin badass, it redefined warrior for me!

n. 1 the climax of gaming excitement, either FPS or RTS, characterised by intensely pleasurable sensations centred in the brain. 2 the climax of combat excitement often felt by military personnel around the world, especially if they are on the winning side, characterised by intensely pleasurable sensations centred in the brain. 3 the climax of cinematic excitement, characterised by intensely pleasurable sensations centred in the brain after having watched a war film or films. v. have a wargasm.
-ORIGIN C20: From Brit.

"I had a right wargasm after finally completing the game in single player mode."

also

".....so I let rip with a full mag' into his chest and he just spun around and fell right over the balcony. It took a week to get over that wargasm."

also

"I had a total wargasm last night, after watching 'Saving Private Ryan' and 'Band of Brothers' back to back"

A term used by war video game players, particularly Call of Duty and Battlefield nerds. A 'Wargasm' is supposedly an orgasmic sensation felt when a player goes on a rampage or killing spree. Nerds claim to shout or scream when they get 'Wargasms' and they also claim that the sensation enables them to get multiple kills in a short time.

Nerd #1: "I just got 5 kills!"
Nerd #2: "Wow! Did you get a wargasm?"
Nerd #1: "Yeah I just got a really long wargasm!"